Turn on VoLTE

Some carriers turn on this feature by default. To find out if VoLTE is on, go to Settings > Cellular > Cellular Data Options > Enable LTE. If Voice & Data is off, tap it to turn on VoLTE.

If you see an error message

When you try to turn on VoLTE, you might see a message that says "Cannot Activate LTE Calls. To enable LTE Calls on this account, contact your carrier.” This can happen with some account types, including business lines, and on some carriers. Please contact your carrier for help.

You might see a message that says to insert a new SIM card. This can happen with older SIM cards. You might need a new SIM card to use VoLTE. Contact your carrier.